Classic study from 1922. Swami Mukerji was a Yogi of the South India Order. He wrote many books about yoga including Yoga Lessons for Developing Spiritual Consciousness, The Yogi Conception of Double Consciousness, The Yogi Conception of Self Development, Yogi Meditation Exercises, The Yogi Conception of Cause and Effect, The Yogi Conception of Life, Who Can Be a Yogi? and The Yogi Role of Prayer. Это и многое другое вы найдете в книге The Doctrine and Practice of Yoga (Dodo Press) (Swami Mukerji)